Been a little while since it was on, but I really liked Lemons (episode 3). Not that fond of the chap playing Jesus, but it was probably the funniest episode so far, I think.
Entangled was good too, and whoever played the chimp deserves a big bunch of bananas. [Assuming it was a person and not an actual chimp].
Not sure how many episodes are left, but after Back To Earth it's a great relief that X's been going so well. I think XI was firmly pencilled in anyway, so this should make it even likelier.